1/4 Plate Alumitype (3.25" x 4.25").
I made this 1/4 plate image of a metronome in motion @ adagio under 5500K compact fluorescent bulbs in a cardboard box. Process used was wet plate collodion. Lens: f8 Dallmeyer Rapid Rectilinear (c. 1891). Exposure time was 1 min. 45 sec.
